/*
 * Copyright 2010 Henry Coles
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and limitations under the License.
 */
package org.pitest.coverage.codeassist;

import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassWriter;
import org.pitest.boot.CodeCoverageStore;
import org.pitest.extension.Transformation;

public class CoverageTransformation implements Transformation {

  public byte[] transform(final String name, final byte[] bytes) {
    final ClassReader reader = new ClassReader(bytes);
    final ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS);

    final int id = CodeCoverageStore.registerClass(name);
    reader.accept(new CoverageClassVisitor(id, writer),
        ClassReader.EXPAND_FRAMES);
    return writer.toByteArray();
  }

}
